Abstract
The cytokinin content of the basal portion of stem cuttings of Impatiens wallerana was examined daily. Both qualitative and quantitative changes were observed in the levels of cytokinin-like compounds over the period of root formation in the stem cuttings. The peak in polar cyokinin-like activity coincided with the initial stages of root primordia initiation and development. Non-polar cytokinin-like activity showed greater fluctuations but only exhibited a substantial increase after the roots had extended through the epidermis and had begun to elongate. It is probable that it is the metabolic ability of the stem tissue to alter the initial levels of hormones present that enables efficient adventitious root formation.
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Taylor, J., van Staden, J. Variation in the level and type of cytokinin with the stage of root development in Impatiens wallerana Hook. f. stem cuttings. Plant Growth Regulation 22, 175–180 (1997). https://doi.org/10.1023/A:1005826628990
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DOI: https://doi.org/10.1023/A:1005826628990